For human groups to grow from small, intimate communities to the huge interconnected societies we know now, people needed to be willing to cooperate with strangers. Religion might have played a big role.

Detractors argue that decolonising the curriculum to include writers like Steve Biko (who was much admired by former president Nelson Mandela) will lower standards.
Mike Hutchings/ReutersJune 4, 2015

In much of the English-speaking world Christmas dinner involves the consumption of turkey – but that was not always the case. The origins of this ritual can be traced back to the generous act of one Ebenezer…